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Stratos LV/LV-T Technical Manual 115
AES vs. Atrial Rate
Information about the number of AES events as a function of the
atrial rate can be found in the AES vs Atrial Rate Histograms.
For Stratos CRT-Ps, single AES bar chart displays the
percentage of specific AES in 17 different rate ranges (< 40 ppm
to > 180 ppm). The atrial rate of the last interval before the AES
serves to classify the AES.
Two sequential AES are saved as a couplet, and three
sequential AES are saved as a triplet.
AES Coupling Interval
The AES coupling interval shows in which millisecond range the
prematurity (distance As/Ap to AES) has occurred. The intervals
of the AES-AES Sequences are displayed from < 200 to 1040
ms in 24 histograms classes. The graphic display shows the
percentage values if the individual classes in the form of a bar
chart and the total number of events.
2.21.4 VES Statistics
The detected VES are ventricular events outside of the AV delay
and the VER discrimination interval after As.
Therefore, it is recommended that the atrial sensing be stable
before activating the VES analysis. If the atrial lead is bipolar,
bipolar sensing should be considered.
The VER prematurity histogram is subdivided into three
percentage classes:
• 0-25% (premature VES-VES from 750 to 1000 ms at 60
ppm in the preceding interval).
• 25-50% (premature for VES-VES from 500 to 750 ms at
60 ppm in the preceding interval).
• >50%(premature for VES-VES from < 500 ms at 60 ppm
in the preceding interval)
The VES sequence histogram also displays single VES’,
couplets, triplets, runs and VT episodes.